This Access tutorial will show you how to create a field in an Access form that will store the calculation between two or more fields. Then the result will be saved to the Table automatically. Its a fun when we can have an automated calculation on a field in a form. Here is the example:
The Form_test is a form build from the Table1. This form is used to entry the data into the Table1. There are three columns or fields on this form. Value A, Value B and Result. The idea is whenever user finish entry the data in Value B, the system will automatically calculate Value A + Value B and store it in Result field. You can modify the calculation scenario but the idea should be the same as this example. Do the following to give automated calculation to a field in Access form.
Open the form in Design View. Now, click The result text box and go to the Even on property sheet.
Click the After Update on the event and select [Event Procedure], then click [….] button close to it. It will open the visual basic editor. Now type the following formula
Private Sub Result_AfterUpdate()
Me.Result = Me.Value_A + Me.Value_B
Save and close it. Now we need to call the above procedure on the Value B field. This procedure above will be executed everytime user edit the field Value B and the result will be displayed on Result field. Do the same way as above to the Value B field and enter this command/procedure
Private Sub Value_B_AfterUpdate()
Done. Now, everytime you enter value on Value A and Value B, it will automatically calculated and stored in Result field.